Earth working implement



P 1951 c. F. DOERFLER EARTH WORKING IMPLEMENT 2 Sheets-Sheet 1 FiledMarch 1, 1948 1/E/\/ TUE CARL r-. DOE-RF-LER P 1951 c. F. DOERFLER EARTHWORKING IMPLEMENT 2 Sheets-Sheet 2 Filed March 1, 1948 Patented Sept.11, 1951 EARTH WIORKING IMPLEMENT 7 Carl F. Doerfler, Bend, Oreg.

- Application March 1, 1948, Serial No. 12,241

2 Claims.

This. invention relates generally to vehicles and particularly to anearth working implement.

The main object of this invention is to provide a single machine bymeans of which leveling, grading, terracing and border building may beaccomplished at a minimum cost and with a relatively small amount oflabor and time and at the same time performing the work in a neat andaccurate manner.

The second object is to provide a machine of the class described whichcan be converted for use in different types of operations without theuse of special tools or requiring extra man power for the change.

The third object is to provide a machine which will perform theoperations mentioned without the use of additional equipment orguess-work.

The fourth object is to make the device selfleveling and to make itpossible to set the machine to produce a pre-determined transverse slopeto the roadway or hold the same level and to maintain this transverseposition automatically with any type of prime mover.

I accomplish these and other objects in the manner set forth in thefollowing specification, as illustrated in the accompanying drawings, inwhich:

Fig. l is a shortened side elevation of the device.

Fig. 2 is a plan of the device.

Fig. 3 is a rear end elevation showing the wheels on transversely levelground with the cutting blade set for level cutting.

Fig. 4 is similar to Fig. 3 but showing the supporting wheels on ahillside with the blade set to reduce the grade.

Fig. 5 is a vertical section taken along the line 5--5 in Fig. 1.

Fig. 6 is a vertical section taken along the line 6-6 in Fig. 1.

Like numbers of reference refer to the same or similar parts throughoutthe several views.

Referring in detail to the drawings, there is showna vehicle whoseground engaging wheels II) are mounted upon the oppositely turned crankends H and I2 formed on the opposite ends of the axle I3 which isrockable in the bearings I4 secured on the sides l5, which are joinedinto an A frame by the ties I6 to I9 and the tubular head v 2 3-1 .1,pin 28' which passes'through the holes 29 in the plate 21'.

20 from which depend the forks 2I between which The holes 29 are formedin an arc whosecenter is a pin (not shown) which connects the members 26and 21.

On top of the'head Zllis secured a gooseneck 34 between which and thetongue 22 is connected a hydraulic jack 30--A to which fluid is admittedfrom a pressure source mounted on the tractor.

By this arrangement the elevation of the head 20 is easily controlled.

0n the rear end of the side members I5 are the upright A frames 3I and32 across the upper ends of which is mounted a shaft 33 from which issuspended a heavy weight 34 by means of the braced arms 35, one of whichis secured to the shaft 33 by means of the set screw 36.

On the shaft 33 is secured a crank arm 31 which is connected to a rod 38in which is placed a turn buckle 39. The lower end of the rod 38 isattached to a crank arm 40 which is secured on the axle l3.

It can be seen that since the weight 34 hangs vertically at all times,it tends to rotate the shaft in a direction which will compensate forchanges in the transverse slope of the ground upon which the wheels l0travel.

Between the wheels I0 and the head 20 are the flanged sections M whichare joined by the gusset plates 42 and 43, through which extends atubular housing 44 which is welded to the plates 42 and 43. Bearingbushings 45 receive the vertical pin 46 whose head 41 is welded to thetop plate 48 of the scraper blade 49 having the usual cutting blade 50attached thereto.

In the flanges 5| of the sections M are formed the holes 52 which can bebrought into register with the holes 53 in the plate 48 and thebulldozer blade 49 held in a fixed relation to the length of the unit,by the pins 54.

It can be seen from the foregoing that since the position of the turnbuckle 39 determines the setting of the cranks I I and 12 which controlthe transverse level of the members I5 and the attached blade 49, thenany change in the transverse level of the roadway will, through theweight 34, produce a correcting tilt of th blade 49.

The depth of the cut is determined by the jack 3ll-A and the lateralmovement of the dirt is controlled by the angular setting of the blade49.

This construction makes it possible to use the device satisfactorily forany of the purposes set forth in the statement of the invention.

I claim:

1. An implement of the class described, including an elongated framehaving a pulling hitch at one end, an axle at the rearward end of saidframe, said axle having oppositely turned eccentric wheel spindles atits ends, a ground engaging wheel on each spindle, a crank arm on saidaxle whereby a limited rocking motion may be imparted to said axle, apendulum arm on said frame, an adiiustab'le connection between saidcrank arm and said pendulum arm, a scraper blade supported by said frameand means for controlling the elevation of the pulling hitch.

2. An implement of the class described consisting of an elongated framehaving a pulling hitch at one end, a scraper blade mounted between itsends, a pair of groundyengagi-ng wheels at the other end of said frame,said wheels having oppositely turned eccentric spindles on .a commonshaft capable of limited rocking movement, a pendulum susp nded-pnsaidframe. and adjustable connections between said pendulum and axle wherebysaid blade will be caused to slope in a relation opposite to thetransverse slope of said wheels.

CARL F.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 705,731 Ach July 29, 1902842,804: Murrell Jan. 29, 1907 21,035,791 "Kellogg .Aug. 13, 19121,262,829 'Neumeier Apr. 16, 1918 1,706,256 Ronning Mar. 19, 19291,709,081 LeTourneau Apr. 16, 1929 1,936,518 McColm Nov. 21, 19332,059,205 'Bufiington Nov. 3, 1936 2,136,911 Briscoe Nov. 15, 19382,255,061 Johnson Sept. 9, 1941 2,278,081 Kramer Mar. 31, 1942 2,502,217Guibor Mar. 28, 1950 FOREIGN PATENTS Number Country Date 250,022 Italyof 1926

